Some grammar rules (and embarrassing mistakes!) transcend the uniqueness of different regions and style guides. This new International Grammar section by OnlineBookClub.org ultimately identifies those rules thus providing a simple, flexible rule-set, respecting the differences between regions and style guides. You can feel free to ask general questions about spelling and grammar. You can also provide example sentences for other members to proofread and inform you of any grammar mistakes.

Thank you, CommMayo. I've already solved the mistery. It seems the writer used a word combination ( sneaker+streak ) in order to suggest that the man was wearing some sort of fast shoes. I should have the post deleted, sorry.
Cheers